Mitsubishi Electric FR-A700 Technical Manual page 51

(3) Auxiliary input (1, 5)
The compensation signal can be input to the main
speed setting (terminals 2 (or 4)-5) for synchronous/
continuous speed control operation, etc.
Terminals 1-5 : 0 to 10VDC,
Functions of terminal 1 varies with the [Pr. 73] setting.
(a) The [Pr. 73] setting is 0 to 3, 6, 7 (initial value
is 1)
The voltage signal across terminals 1-5 is
added to the voltage signal (positive) across
terminals 2 (or 4)-5. If the result of addition is
negative, it is regarded as 0 and the motor
comes to a stop.
Output frequency
− 5V
− 2.5V
0
+2.5V
( − 5V)
( − 10V)
(+ 5V)
Forward rotation
When
STF-SD
is ON
Forward rotation
(b) When the [Pr. 73] setting is 10 to 13, 16, 17
The polarity reversible operation function is
selected. The voltage signal across terminals
1-5 is added to the voltage signal (positive)
across terminals 2 (or 4)-5. A positive addition
result start forward rotation (if terminal STF is
ON) and a negative result starts reverse
rotation (if terminal STF is ON).
Output frequency
− 5V
− 2.5V
( − 10V) ( − 5V)
Reverse
rotation
When
STF-SD
is ON
Reverse rotation Forward rotation
The compensation signal of terminal 1 can also be
added to the multi-speed setting or 4 to 20mA current
input.
Inverter Output According to Start Signal and Auxiliary
Input Terminal Polarity
Added
[Pr. 73]
Command
Setting
Voltage
+
0 to 3, 6, 7
-
+
10 to 13, 16,
17
-
A700 F700
5V
2.5V (5V) across
terminals 2 (or 4) -5
0V across
terminals 2 (or 4)-5
+5V Terminal 1
(+10V)
2.5V (5V) across
(or 4)
terminals 2 -5
0V across
terminals 2 (or 4)-5
0 +2.5V +5V Terminal 1
(+ 5V) (+10V)
Forward rotation
Start Signal Input
STF STR
Forward Reverse
rotation rotation
Stop Stop
Forward Reverse
rotation rotation
Reverse Forward
rotation rotation
1) Multi-speed input compensation
Setting 1 in [Pr.28 Multi-speed input compensation
selection] (initial value 0) adds voltage of terminal 1
to multi-speed operation on page 48.
2) Override
For the above compensation input, the fixed
compensation amount is applied to each speed.
Using the override function easily varies each
speed equally.
Set any of 4, 5, 14, 15 in [Pr.73] to use the
override. The override allows the multi-speeds
set in the parameters, analog input across
terminals 1-5, or current input across terminals 4-
5 to be changed at a constant rate between 50%
and 150% (when initial value is set) according to
the external analog signal input to across
terminals 2-5.
How to find each speed (frequency (f))
×
f = f
pr.
100
f . : speed setting value [Hz]
pr
Multi-speed
Terminal 1-5 analog input
Current across terminals 4-5
α : override compensation amount [%]
(terminal 2-5 analog input)
150%
100%
50%
0
Override Setting Signal and
Compensation Amount
High speed
Multi-speed Override Operation
MCCB
Power
supply
Forward rotation
Reverse rotation
Speed
selection
Override connection diagram
44
SPECIFICATIONS
α
[Hz]
2.5 5V
(5) (10V)
Compensation range
by override
Middle speed
Low speed
Motor
Inverter
IM
STF
STR
SD 10
2
RH
RM 5
RL
Terminal 2
t
Conveyor
Override
setting signal